The preamplifier supports selectable HI-LO minimum balanced and floating input impedances that accommodate a range of microphone types including vintage ribbons. A +48V phantom power button is included on both channels, as well as an input level knob for adjusting to your source. You can also switch the module into line mode to re-amplify prerecorded tracks and add color to a mix. Plugging in a mono 1/4" input into the DI port on the front of the unit automatically switches the module from MIC to DI mode. A selectable discrete component Class A 3rd order 80 Hz high-pass filter with an 18 dB per octave slope has been added for recording sources without the effects of low frequency coloration. An output control knob is included to prevent overloading the preamplifier.
The unit is powered by an external linear power supply to reduce the effects of electromagnetic interference on the audio transformers. The unit features gold-plated Neutrik XLR input and output connectors. To achieve the classic feel of the original 1073, the unit is constructed with Marconi-style knobs and vintage engraved pushbuttons for the DI, low impedance, line, pad, phase, and high-pass functions.
The Heritage Audio DMA71 2-Channel microphone preamp combines outstanding Class A preamp design and premium componentry to provide you pristine audio details and sonic flexibility. Perfect for old ribbon mics, the 80dB microphone preamp lets you faithfully re-create that vintage sound. The Heritage Audio DMA73 also features ultra-high-impedance J-Fet direct input and 20dB pad, so you'll have clarity in your signal chain without the fear of overloading. Armed with Neutrik input and output jacks, the Heritage Audio DMA73 2-channel microphone preamplifier is a front-end like no other.
Heritage Audio 1073/500 500 Series Microphone Preamplifier at a Glance
- Platinum sound as soon as you hit record
- Built to original specs for a true vintage re-creation
- Top-notch performance from Class A preamp circuitry
Talk to any engineer who's worked on a vintage console - if you've got the right mics in front of the sources, just bring up the faders and your sound is mostly there. That's what you get with the Heritage Audio DMA73. Think big, punchy, vibrant sound that seems to leap from your speakers. It's the sound that created countless hit albums, and you've got it on tap with the DMA73 preamp.
Built to original specs for a true vintage re-creation
In fact, the only technical difference between the Heritage Audio DMA73 and an original module is the size. Inside, you'll find the same transformers, dual-concentric switches, pushbuttons, and even the same PCB cards. So don't think the DMA73 is another vintage emulation or copycat.
Top-notch performance from Class A preamp circuitry
The DMA73 packs 80dB of gain in its Class A mic preamp, perfect for ribbon mics and low-output dynamics. The design is also single ended, 2N3055 driven, and provides high headroom. As a result, the sound is full, punchy, and gets incredibly vibrant when you push your signal levels.
Heritage Audio DMA73 2-Channel Class A Mic Preamp Features
- 80dB Class A microphone preamplifier
- 50dB Class A line preamplifier
- Class A ultra-high-impedance J-Fet direct input
- Individual Neutrik gold plated XLR connectors
- 20dB mic input attenuation pad
- 80Hz highpass filter
- External linear PSU to avoid electromagnetic radiation into the audio transformers ( a.k.a. hum )
- Carnhill Input and Output transformers
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